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Finding the Fourth Proportional to 388, 579.08 and 384.16

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Solution

The fourth proportional to 388, 579.08 and 384.16 is: 573.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    388 : 579.08 = 384.16 : x
  2. Step 2: Convert to fraction form
    388/579.08 = 384.16/x
  3. Step 3: Cross multiply
    388x = 579.08 × 384.16
  4. Step 4: Simplify right side
    388x = 222,459.37
  5. Step 5: Solve for x
    x = 222,459.37/388
  6. Step 6: Final answer
    x = 573.35

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.